Creation of Ultracold 87Rb133Cs Molecules in the Rovibrational Ground State

Molony, Peter K.; Gregory, Philip D.; Ji, Zhonghua; Lu, Bo; Köppinger, Michael P.; Le Sueur, C. Ruth; Blackley, Caroline L.; Hutson, Jeremy M.; Cornish, Simon L.

Abstract

We report the creation of a sample of over 1000 ultracold Rb 87 Cs 133 molecules in the lowest rovibrational ground state, from an atomic mixture of Rb 87 and Cs 133 , by magnetoassociation on an interspecies Feshbach resonance followed by stimulated Raman adiabatic passage (STIRAP). We measure the binding energy of the RbCs molecule to be hc×3811.576(1)  cm −1 and the |v '' =0,J '' =0⟩ to |v '' =0,J '' =2⟩ splitting to be h×2940.09(6)  MHz . Stark spectroscopy of the rovibrational ground state yields an electric dipole moment of 1.225(3)(8) D, where the values in parentheses are the statistical and systematic uncertainties, respectively. We can access a space-fixed dipole moment of 0.355(2)(4) D, which is substantially higher than in previous work.

Citation

Molony, P. K., Gregory, P. D., Ji, Z., Lu, B., Köppinger, M. P., Le Sueur, C. R., Blackley, C. L., Hutson, J. M., & Cornish, S. L. (2014). Creation of Ultracold 87Rb133Cs Molecules in the Rovibrational Ground State. Physical Review Letters, 113(25), Article 255301. https://doi.org/10.1103/physrevlett.113.255301

• Journal Article Type: Article
• Acceptance Date: Nov 12, 2014
• Online Publication Date: Dec 17, 2014
• Publication Date: Dec 17, 2014
• Deposit Date: Feb 4, 2015
• Publicly Available Date: Apr 2, 2015
• Journal: Physical Review Letters
• Print ISSN: 0031-9007
• Electronic ISSN: 1079-7114
• Publisher: American Physical Society
• Peer Reviewed: Peer Reviewed
• Volume: 113
• Issue: 25
• Article Number: 255301
• DOI: https://doi.org/10.1103/physrevlett.113.255301
• Public URL: https://durham-repository.worktribe.com/output/1415175